Rails Ajax Snippets

_post_row.html.erb

<li><%= post.content %></li>

create.js.erb

$('ul.posts').append("<%= escape_javascript(render 'post_row', :post => @post) %>");
$('form input[type="text"]').val("");

index.html.erb

<%= form_for(@post, :remote => true) do |f| %>
  <div class="field">
    <%= f.label :content %><br />
    <%= f.text_field :content %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

<% if @posts %>
  <ul class="posts">
    <% @posts.each do |post| %>
      <%= render 'post_row', :post => post %>
    <% end %>
  </ul>
<% end %>

posts_controller.rb

def create
  @post  = Post.new(params[:post])

  respond_to do |format|
    if @post.save
      format.html { redirect_to @post }
      format.js
    else
      format.html { render "new" }
    end
  end
end